8-2Garmin GDL 88 ADS-B Transceiver Pilot’s Guide 190-01122-03 Rev. CReportingPriorityFault Type ADS-B AnnunciatorLight(s) ActivatedDescription1 TransmitFailBoth A GDL 88 internal malfunction,antenna malfunction, or incorrectconfiguration setting preventtransmission.2 NoPositionNO POSN The GDL 88 is not receiving GPSposition.3 Fault FAULT A GDL 88 or external fault preventproper operation of the GDL 88.-- No Fault Neither No fault present.Table 8-1 GDL 88 Fault Types8.2 Servicing Your UnitThe Garmin GDL 88 has no user-serviceable parts. Should you ever encountera problem with your unit, take it to an authorized Garmin dealer for repairs, orcontact Garmin Product Support at 1-866-739-5687.The GDL 88 is sealed to protect the unit. Any attempt to open the case tochange or modify the unit in any way voids your warranty and may result inpermanent damage to the equipment.8.3 Contact GarminContact Garmin if you have any questions while using your GDL 39. In theUSA, contact Garmin Product Support by phone: (913) 397-8200 or (866) 739-5687, Monday–Friday, 7 AM–7 PM Central Time; or go to:https://fly.garmin.com/fly-garmin/support.In Europe, contact Garmin (Europe) Ltd. at +44 (0) 870.8501241 (outside theUK) or 0808 2380000 (within the UK).